Scaffold



(trommel.) GI BEHNGKE E L J. FRANK.

SGAPPOLD.

No. 435,620. Patented Sept. 2, 1890.

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UNITED STATES GUSTAV BEHNOKE AND LEOPOLD J.

PATENT OFFICE.

FRANK, OF OSHKOSH, VISOONSIN.

SCAFFOLD.

SPECIFICATION forming part of Letters Patent No. 435,620, dated September 2, 1890.

Application filed April 12, 1890.

To @ZZ whom it may concern:

Be it known that we, GUsTAv BEHNCKE and LEOPOLD J. FRANK, citizens of the United States, residing at the city of Oshkosh, iu the county of Winnebago and State of Visconsin, have invented certain new and useful Improvements in Scaffolds; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters 0f reference marked thereon, which form a part of this specification.

Our invention relates principally to a scaffolding or staging for inside decorating and finishing; and the objects of our invention are to provide a simple and safe means of raising or lowering the staging and to equalize the raising-power so that the platform shall be exactly level at all times. lVe attain these objects by the mechanism illustrated in. the accompanying drawings, in which- Figure l is a side view of the staging and front view of the raising and lowering device, and Fig. 2 a front and side view of the same, respectively.

Similar letters refer to similar parts th roughout the several views.

A A are the stanchions, which, with the cross-piece B and the feet O O, form the supporting-frame, two of which are usually used to support the plank D, upon which the decorator stands, as shown in Fig. 2.

The plank D is supported and carried by the bar E in each frame, which slides up and down in grooves in the stanchions A A, and is attached to the rope c e, which passes upward over the pulleys c c and downward to where the ends wind and unwind upon the spools or drum 'L' t' of the windlass as the rod G is turned forward and backward by the crank H. The pawl x engages the ratchet-wheel m, attached to said rod, so as to stop its revolution when desired.

We allow the rope e to continue through an eye or opening in the bar E at e', and se- Serial No. 347,662. (No model.)

cure it by the set-screw f or other suitable gripping device,com pressing it tightly against the side of the opening c. We regard this as an important feature of our invention, as by this means the bar E can at any time be adjusted to a level, which is very necessary to prevent tools, material, die., from rolling or sliding from the plank D. If independent ropes are attached at each end of the bar E, they soon become of unequal length in operating the machine, and we have found this to be the case even where wire cable is used.

In our invention we have only to loosen the set-screw f, adjust the bar E to a level, and reset the screw.

The spools t' t' are exactly of the same circumference, so that by turning the crank H on each machine the hoisting-rope winds equally upon each side, and the bar E, always at a level, is thereby .raised or lowered to any desired position.

It is not necessary to remove anything from the plank D, and the decorator need not at any time descend from the plank D, as he can be raised or lowered by his assistants, the windlass giving suflioient power for that purpose.

Therefore what we claim as our invention, and desire to secure by Letters Patent, is

In a scaffold, the combination of upright supporting-frames, a windlass at the lower part of each frame, pulleys at the top, a rope having its ends secured to the windlass-drum and passing upwardly over the pulleys and then downwardly, sliding bars or supports for a platform, each bar being provided with an eye or opening through which the central part of the rope passes, and a gripping device for preventing the rope from slipping in the bars.

In testimony whereof we aiiix our signatu res in presence of two witnesses.

GUSTAV BEHNOKE. LEOPOLD J. FRANK. Witnesses:

EDWARD WHITE, EARL P. FINCH. 

